At the Long Now Foundation in San Francisco’s Fort Mason, The Interval is one of the most intellectually extraordinary bar and cafe experiences in California: a beautiful bar designed by designers Roman Mars and Stewart Brand inside a cultural institution dedicated to long-term thinking, filled with the mechanical prototype of the 10,000 Year Clock, a curated library of civilization-saving books, and a cocktail program developed by award-winning bartender Jennifer Colliau. Cold, thoughtfully made cocktails in the most interesting room in San Francisco.